From d6b6e94e1128306f5e80a8baf1feda47421e91f3 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Wed, 6 Mar 2024 16:02:25 +0000 Subject: io_uring: fix mshot read defer taskrun cqe posting [ Upstream commit 70581dcd0601a09f134f23268e3374e15d736824 ] We can't post CQEs from io-wq with DEFER_TASKRUN set, normal completions are handled but aux should be explicitly disallowed by opcode handlers. Cc: stable@vger.kernel.org Fixes: fc68fcda04910 ("io_uring/rw: add support for IORING_OP_READ_MULTISHOT") Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/6fb7cba6f5366da25f4d3eb95273f062309d97fa.1709740837.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- io_uring/rw.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'io_uring') diff --git a/io_uring/rw.c b/io_uring/rw.c index d5e79d9bdc71..8756e367acd9 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -932,6 +932,8 @@ int io_read_mshot(struct io_kiocb *req, unsigned int issue_flags) */ if (!file_can_poll(req->file)) return -EBADFD; + if (issue_flags & IO_URING_F_IOWQ) + return -EAGAIN; ret = __io_read(req, issue_flags); -- cgit v1.2.3